import 'package:flutter/material.dart';

import 'package:flutter_gen/gen_l10n/l10n.dart';
import 'package:matrix/matrix.dart';
import 'package:swipe_to_action/swipe_to_action.dart';

import 'package:fluffychat/config/themes.dart';
import 'package:fluffychat/utils/date_time_extension.dart';
import 'package:fluffychat/utils/string_color.dart';
import 'package:fluffychat/widgets/avatar.dart';
import 'package:fluffychat/widgets/matrix.dart';
import '../../../config/app_config.dart';
import 'message_content.dart';
import 'message_reactions.dart';
import 'reply_content.dart';
import 'state_message.dart';
import 'verification_request_content.dart';

class Message extends StatelessWidget {
  final Event event;
  final Event? nextEvent;
  final bool displayReadMarker;
  final void Function(Event) onSelect;
  final void Function(Event) onAvatarTab;
  final void Function(Event) onInfoTab;
  final void Function(String) scrollToEventId;
  final void Function() onSwipe;
  final bool longPressSelect;
  final bool selected;
  final Timeline timeline;

  const Message(
    this.event, {
    this.nextEvent,
    this.displayReadMarker = false,
    this.longPressSelect = false,
    required this.onSelect,
    required this.onInfoTab,
    required this.onAvatarTab,
    required this.scrollToEventId,
    required this.onSwipe,
    this.selected = false,
    required this.timeline,
    super.key,
  });

  @override
  Widget build(BuildContext context) {
    if (!{
      EventTypes.Message,
      EventTypes.Sticker,
      EventTypes.Encrypted,
      EventTypes.CallInvite,
    }.contains(event.type)) {
      if (event.type.startsWith('m.call.')) {
        return const SizedBox.shrink();
      }
      return StateMessage(event);
    }

    if (event.type == EventTypes.Message &&
        event.messageType == EventTypes.KeyVerificationRequest) {
      return VerificationRequestContent(event: event, timeline: timeline);
    }

    final client = Matrix.of(context).client;
    final ownMessage = event.senderId == client.userID;
    final alignment = ownMessage ? Alignment.topRight : Alignment.topLeft;
    var color = Theme.of(context).colorScheme.surfaceVariant;
    final displayTime = event.type == EventTypes.RoomCreate ||
        nextEvent == null ||
        !event.originServerTs.sameEnvironment(nextEvent!.originServerTs);
    final sameSender = nextEvent != null &&
        {
          EventTypes.Message,
          EventTypes.Sticker,
          EventTypes.Encrypted,
        }.contains(nextEvent!.type) &&
        nextEvent?.relationshipType == null &&
        nextEvent!.senderId == event.senderId &&
        !displayTime;
    final textColor = ownMessage
        ? Theme.of(context).colorScheme.onPrimaryContainer
        : Theme.of(context).colorScheme.onBackground;
    final rowMainAxisAlignment =
        ownMessage ? MainAxisAlignment.end : MainAxisAlignment.start;

    final displayEvent = event.getDisplayEvent(timeline);
    final borderRadius = BorderRadius.only(
      topLeft: !ownMessage
          ? const Radius.circular(4)
          : const Radius.circular(AppConfig.borderRadius),
      topRight: const Radius.circular(AppConfig.borderRadius),
      bottomLeft: const Radius.circular(AppConfig.borderRadius),
      bottomRight: ownMessage
          ? const Radius.circular(4)
          : const Radius.circular(AppConfig.borderRadius),
    );
    final noBubble = {
          MessageTypes.Video,
          MessageTypes.Image,
          MessageTypes.Sticker,
        }.contains(event.messageType) &&
        !event.redacted;
    final noPadding = {
      MessageTypes.File,
      MessageTypes.Audio,
    }.contains(event.messageType);

    if (ownMessage) {
      color = displayEvent.status.isError
          ? Colors.redAccent
          : Theme.of(context).colorScheme.primaryContainer;
    }

    final row = Row(
      crossAxisAlignment: CrossAxisAlignment.start,
      mainAxisAlignment: rowMainAxisAlignment,
      children: [
        if (sameSender || ownMessage)
          SizedBox(
            width: Avatar.defaultSize,
            child: Center(
              child: SizedBox(
                width: 16,
                height: 16,
                child: event.status == EventStatus.sending
                    ? const CircularProgressIndicator.adaptive(
                        strokeWidth: 2,
                      )
                    : event.status == EventStatus.error
                        ? const Icon(Icons.error, color: Colors.red)
                        : null,
              ),
            ),
          )
        else
          FutureBuilder<User?>(
            future: event.fetchSenderUser(),
            builder: (context, snapshot) {
              final user = snapshot.data ?? event.senderFromMemoryOrFallback;
              return Avatar(
                mxContent: user.avatarUrl,
                name: user.calcDisplayname(),
                presenceUserId: user.stateKey,
                onTap: () => onAvatarTab(event),
              );
            },
          ),
        Expanded(
          child: Column(
            crossAxisAlignment: CrossAxisAlignment.start,
            mainAxisSize: MainAxisSize.min,
            children: [
              if (!sameSender)
                Padding(
                  padding: const EdgeInsets.only(left: 8.0, bottom: 4),
                  child: ownMessage || event.room.isDirectChat
                      ? const SizedBox(height: 12)
                      : FutureBuilder<User?>(
                          future: event.fetchSenderUser(),
                          builder: (context, snapshot) {
                            final displayname =
                                snapshot.data?.calcDisplayname() ??
                                    event.senderFromMemoryOrFallback
                                        .calcDisplayname();
                            return Text(
                              displayname,
                              style: TextStyle(
                                fontSize: 12,
                                fontWeight: FontWeight.bold,
                                color: (Theme.of(context).brightness ==
                                        Brightness.light
                                    ? displayname.color
                                    : displayname.lightColorText),
                              ),
                            );
                          },
                        ),
                ),
              Container(
                alignment: alignment,
                padding: const EdgeInsets.only(left: 8),
                child: Material(
                  color: noBubble ? Colors.transparent : color,
                  borderRadius: borderRadius,
                  clipBehavior: Clip.antiAlias,
                  child: Container(
                    decoration: BoxDecoration(
                      borderRadius:
                          BorderRadius.circular(AppConfig.borderRadius),
                    ),
                    padding: noBubble || noPadding
                        ? EdgeInsets.zero
                        : const EdgeInsets.symmetric(
                            horizontal: 16,
                            vertical: 8,
                          ),
                    constraints: const BoxConstraints(
                      maxWidth: FluffyThemes.columnWidth * 1.5,
                    ),
                    child: Column(
                      mainAxisSize: MainAxisSize.min,
                      crossAxisAlignment: CrossAxisAlignment.start,
                      children: <Widget>[
                        if (event.relationshipType == RelationshipTypes.reply)
                          FutureBuilder<Event?>(
                            future: event.getReplyEvent(timeline),
                            builder: (BuildContext context, snapshot) {
                              final replyEvent = snapshot.hasData
                                  ? snapshot.data!
                                  : Event(
                                      eventId: event.relationshipEventId!,
                                      content: {
                                        'msgtype': 'm.text',
                                        'body': '...',
                                      },
                                      senderId: event.senderId,
                                      type: 'm.room.message',
                                      room: event.room,
                                      status: EventStatus.sent,
                                      originServerTs: DateTime.now(),
                                    );
                              return InkWell(
                                onTap: () =>
                                    scrollToEventId(replyEvent.eventId),
                                child: AbsorbPointer(
                                  child: Container(
                                    margin: const EdgeInsets.symmetric(
                                      vertical: 4.0,
                                    ),
                                    child: ReplyContent(
                                      replyEvent,
                                      ownMessage: ownMessage,
                                      timeline: timeline,
                                    ),
                                  ),
                                ),
                              );
                            },
                          ),
                        MessageContent(
                          displayEvent,
                          textColor: textColor,
                          onInfoTab: onInfoTab,
                          borderRadius: borderRadius,
                        ),
                        if (event.hasAggregatedEvents(
                          timeline,
                          RelationshipTypes.edit,
                        ))
                          Padding(
                            padding: const EdgeInsets.only(
                              top: 4.0,
                            ),
                            child: Row(
                              mainAxisSize: MainAxisSize.min,
                              children: [
                                Icon(
                                  Icons.edit_outlined,
                                  color: textColor.withAlpha(164),
                                  size: 14,
                                ),
                                Text(
                                  ' - ${displayEvent.originServerTs.localizedTimeShort(context)}',
                                  style: TextStyle(
                                    color: textColor.withAlpha(164),
                                    fontSize: 12,
                                  ),
                                ),
                              ],
                            ),
                          ),
                      ],
                    ),
                  ),
                ),
              ),
            ],
          ),
        ),
      ],
    );
    Widget container;
    if (event.hasAggregatedEvents(timeline, RelationshipTypes.reaction) ||
        displayTime ||
        selected ||
        displayReadMarker) {
      container = Column(
        mainAxisSize: MainAxisSize.min,
        crossAxisAlignment:
            ownMessage ? CrossAxisAlignment.end : CrossAxisAlignment.start,
        children: <Widget>[
          if (displayTime || selected)
            Padding(
              padding: displayTime
                  ? const EdgeInsets.symmetric(vertical: 8.0)
                  : EdgeInsets.zero,
              child: Center(
                child: Material(
                  color: displayTime
                      ? Theme.of(context).colorScheme.background
                      : Theme.of(context)
                          .colorScheme
                          .background
                          .withOpacity(0.33),
                  borderRadius:
                      BorderRadius.circular(AppConfig.borderRadius / 2),
                  clipBehavior: Clip.antiAlias,
                  child: Padding(
                    padding: const EdgeInsets.all(6.0),
                    child: Text(
                      event.originServerTs.localizedTime(context),
                      style: TextStyle(fontSize: 14 * AppConfig.fontSizeFactor),
                    ),
                  ),
                ),
              ),
            ),
          row,
          if (event.hasAggregatedEvents(timeline, RelationshipTypes.reaction))
            Padding(
              padding: EdgeInsets.only(
                top: 4.0,
                left: (ownMessage ? 0 : Avatar.defaultSize) + 12.0,
                right: 12.0,
              ),
              child: MessageReactions(event, timeline),
            ),
          if (displayReadMarker)
            Row(
              children: [
                Expanded(
                  child: Divider(color: Theme.of(context).colorScheme.primary),
                ),
                Container(
                  decoration: BoxDecoration(
                    border: Border.all(
                      color: Theme.of(context).colorScheme.primary,
                    ),
                    color: Theme.of(context).colorScheme.primaryContainer,
                    borderRadius: BorderRadius.circular(4),
                  ),
                  margin: const EdgeInsets.all(8.0),
                  padding: const EdgeInsets.symmetric(
                    horizontal: 8,
                  ),
                  child: Text(
                    L10n.of(context)!.readUpToHere,
                    style:
                        TextStyle(color: Theme.of(context).colorScheme.primary),
                  ),
                ),
                Expanded(
                  child: Divider(color: Theme.of(context).colorScheme.primary),
                ),
              ],
            ),
        ],
      );
    } else {
      container = row;
    }

    if (event.messageType == MessageTypes.BadEncrypted) {
      container = Opacity(opacity: 0.4, child: container);
    }

    return Center(
      child: Swipeable(
        key: ValueKey(event.eventId),
        background: const Padding(
          padding: EdgeInsets.symmetric(horizontal: 12.0),
          child: Center(
            child: Icon(Icons.check_outlined),
          ),
        ),
        direction: SwipeDirection.endToStart,
        onSwipe: (_) => onSwipe(),
        child: InkWell(
          onTap: () => onSelect(event),
          child: Container(
            color: selected
                ? Theme.of(context).primaryColor.withAlpha(100)
                : Theme.of(context).primaryColor.withAlpha(0),
            constraints: const BoxConstraints(
              maxWidth: FluffyThemes.columnWidth * 2.5,
            ),
            padding: const EdgeInsets.symmetric(
              horizontal: 8.0,
              vertical: 4.0,
            ),
            child: container,
          ),
        ),
      ),
    );
  }
}
